If we can consider the act of healing from rain under a tree as the most primary architectonic action, we would consider sitting in a rock as the constructive act of a chair. The rock for sitting is completely opposite to the Superleggera: the rock lacks of the technical development of the chair. But, moreover the formal and instrumental traits, making a sit of rock and carry it to an exhibition in Portbou has other technical and environmental conditions. Fer cosa fora raises a serie of actions from this idea. At the exhibition Fer amb el que es té we featured a sit made of the stacking of rock oddments.